Combing machine



March 26, 1929. J, w. NASMITH comma MACHINE Filed Feb. 29', 1928 Inven l0r:

' By His flfforne Patented Mar. 26, 1929.

nrnrsn srnfrss P lEhlT OFFICE.

CUMBING Jl'lTACI-IINE.

Application filed; February 29, was. Serial lilo. 358,034.

in the United States specification No.

1,454,484 I have described and claimed a means for weighting the top leather covered detaching roller in av combing machine oi? the Nasmith type, the weighting being ed in such a manner lLl'ltL J the pressure on the said roller is reduced during that part oil? each stroke of the machine when such weight ing is unnecessary, that is to say, when no dctaching is taking; place. The lite of the leather covering of the top roller is thus prolonged.

The top roller in its detaching stroke and reverse strolre rolls bodily upon its lower metal. roller, and in the specification l lo. lfllielgldet this combined with suitable accessories served to vary the tension of a spring 2 shown in Figures 1 and 2 oi the drawings accompanying that specification. It is found in practice however that whilst the spring referred to adequately fulfills its function as a spring, there is a ditliculty in obtaining commercially springs which are when new of the same tension or strength, and further, there is the danger that the screw adjust ment of the spring tension may be tampered with by unauthorized persons, thus detracting from the industrial value of the device.

The object of the present improvements is to provide means for relieving the weight from the top roller with substantially the same accessories as those described in the specification No. instant except that the s gning; is dispensed with, and in its stead there is provided a positive weighting means consisting; of a weight or weights, the variation in pressure upon the top detachii'i g roller depending upon the angle made by the said lever and its weight or weights as the top roller rolls to and, fro.

in a convenient :torm the weighting is applied by means of two articulated arms torming the weight lever, the articulated ends be ing weighted to the desired extent and the accessories are so arranged that as through the movement of the parts, the lever arms assume the straight or horizontal position the pres sure applied increases, the reverse taking place as owing to the movement 01 the accessories oi. themachine and of the top roller, the articulated arms of the lever term an increasing angle to each other.

The improvements in this form will now be fully described reference being had to the accompanying;' drawing which shows the ap paratus in side elevation.

teterring to the drawing which shows a combing head, C the cylinder, it the rock shaft and l? a tired pin which are iournalled in the frame head (not shown). This frame also carries a bearing for the shaft S and the steel clenching rollers D, D @n the shaft E5 is heyed the two armed lever L which is rocked to and fro from the rocking; shaft it through the adjustable llllli l t, the shaft 1t hemp; oscillated in the usual manner from a :am or eccentric in the machine headstock. The upl er arm 01' the lever L carries a pin 1 upon which is loosely pivoted the weight hoolr H the other end of which bears upon the neck of the leather covered top detaching; roller cl. Attached as shown to the lower part of the hook H is a tail member T.

Upon the pin P is pivoted the pendent arm 5 which supports one end of a lone lever K and the upper end oi? this lever K is by means ot a hooked extremity pivoted loosely on the pin 1. All of these parts just described are substantially as shown in the prior specification and they term per no part of these present improvements, beinginserted here for a clear understanding of the drawing. The adjustable spring;' which in that specification joins the lower end of lever K and the lower end of the tail T is dispensed with and according to these present improvements a lever connects these two members, one of the arms o1? which to has av forked end provided with a pin 10 which hinges in a notch in the lower end oi tail T. This arm to has also fitted therein a pin .1 which tits in a. notched end of them-in W. The articulated ends of w, i i are weighted at 12 as shown in the drawing.

The end of the arm W which connected to the lever li'I is bifurcated and hinges on a pin 13 which engages in a slot 14L cast in the lever h: and this pin is tap ied to receive the screw 15 whereby its position in the slot 14 may be regulated.

The pendent swinging arm 5 is notched as shown at 16 and a knife edged support 17 carried by the lever rests in the notch.

In the drawing, the parts are shown in the position assumed by them when the top ,dctaching roller (Z is in its most forward position, when the greatest pressure upon it is required for detaching. At each stroke of the apparatus this roller moves between its full line and dotted line positions.

During; the operation oi the machine the lever L rocking to the left serves to bring forward the pin 1 and thus the lever K, with theresult that the lower end of this lever moves t the right and thus allows the arm to of the weight lever to drop at its inner and weighted end. The top roller cl simultaneously moves to its dotted line position with leas' consequent movement of the weight hook H and ta l T, thearm W thus hkewise dropping at its weighted end, and the whole lever to,

pulled up to the full line posit-i on thus increasingthe weight applied to the hook H and thus to the top roller.

By suitably dimensioning the various parts and allowing the levers w and to oscillate between their two extreme positions as the apparatus operates, a very small weighting will givethe requisite pressure on the roller (Z, varying to, the desired extent.

In the construction shown in the drawing); the lever 'K serves to raise the weight hook from the top roller (Z when the latter is to be removed for any reason. For this purpose the lower end of the lever K is'lifted to bringthe kni e. edge support 17 from its notch 16 and it is then allowed to drop, aface 7 formed there-oncoming against a face 8 on the weight hook 11 and thus by the weight of the lever K forcing the curved end of the weight'hook from the neck of the top detaching roller (Z. This function of the lever K is however substantially described in the prior specification No. 1-;454A84 and is not herein claimed.

The particular afrrangen'ient of weighting shown allows of a light weight being applied with good weiglit-ingr effect upon the top detaching roller and the weighting and variation thereof will depend upon the angle which 4,0 makes to XV when the articulated ends of these members are at their highest point. T he pull ofthe weighted ends of these members is very great if they are so dimensioned and arranged that they form a straight line when they reach such highest point and as will be seen, if they were so arranged that the arm ,W dropped, on the non-detaching stroke of thetop rollerd, to a position in which it was nearly or quite in prolongation of the tail member T, the weighting of the hook H would be small orentirely absent. The 'relative positionss'hown in the drawings are found e'tficient in practice.

'1. ins "combing machine of the Nasmit'h type having a top detaching roller which rolls to and fro upon a lower roller, a weight hook one end of which is hung upon the top roller, weighting means for the said weight hook and means for lowering; the said weighting! means on the non-detaching stroke of the top roller to lessen the pull of such weighting means upon the hook and for raisin g the said weighting means to increase the pull of such weighting means upon the hook on the detaching stroke of the top roller, such weight raising and loworin; means being actuated synchronously with the movement of the said roller.

2. In a combing}; machine of the Nasrnith type having a top detaching: roller which rolls to and fro upon a lower roller a weight hook one end of which hung: upon the top roller, a pivot support, a centrally articulated lever pivoted at one end to the support and at the other end pivotally supported by the weight hook, the hook moving towards the pivot support during: and as a result of the non-detaching movement of the top roller and vice versa and weighting means borne by the lever adjacent to its articulation.

3. In a combing machine of the Nasniith type, having a top detaching roller which rolls to and fro upon a lower roller, 1 weight hook one end of which is hung upon the top roller, a pivot support formed upon a lover, a centrally articulated lever pivoted at one end to the pivot support and at the other end supported by the weight hooln the hook moving towards the pivot support and the latter moving towards the hook during the ntm-dctarching movement of the top roller and vice versa, weighting means borne by the lever adjacent to its articulation. and means for movmg the pivot support-bearing lever synchronously with the top roller and its weight hook.

4:. In a combing machine of the Nasmith type, having a top detaching roller which rolls to and fro upon a lower roller, a weight hook one cm. of which is hung upon the top detaching roller, a. pivot support formed upon a lever a centrally articulated lever pivoted. at one end to the pivot support and pivotally supported at the other end by the weight hook means for moving the pivoted support bearinglever towards the weight hook on the non-detaching moven'iont of the top roller and vice-versa, and weighting means borne by the articulated lever adjacent to its articulation.

In testimony whereof I have hereunto set my hand.

JOHN lVl'LLIi Uvf NASMI'IFI'I.

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